<template>
<el-container class="home-container">
  <el-header>
      <div>
          <img src="../assets/heima.png" alt="">
          <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
  </el-header>
  <el-container>
    <el-aside :width="isCollapse ?'64px': '200px'">
        <div class="toggle-button" @click="toggleCollapse">
            |||
        </div>
        <el-menu
        background-color="#333744"
        text-color="#fff"
        active-text-color="#4373d4"
        :unique-opened ="true"
        :collapse="isCollapse"
        :collapse-transition="false"
        router
        :default-active="activePath"
        >
            <el-submenu :index="item.id + ''" v-for="item in menuList" :key="item.id">
                <template slot="title">
                <i class="el-icon-location"></i>
                <span>{{item.authName}}</span>
                </template>

                <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children" 
                    :key="subItem.id" @click="saveNavState('/' + subItem.path)">
                    <template slot="title">
                        <i class="el-icon-menu"></i>
                        <span>{{subItem.authName}}</span>
                    </template>
                </el-menu-item>
            </el-submenu>
        </el-menu>
    </el-aside>
    <el-main><router-view></router-view></el-main>
  </el-container>
</el-container>
</template>

<script>
export default {
    data(){
        return{
            menuList: [],
            isCollapse: false,
            //被激活的连接地址
            activePath: ''
        }
    },
    created(){
        this.getMenuList()
        this.activePath=window.sessionStorage.getItem('activePath')
    },
    methods: {
        logout() {
        this.$confirm("确认退出吗?", "提示", {
            confirmButtonText: "确定",
            cancelButtonText: "取消",
            type: "warning",
        })
            .then(() => {
            this.$message({
                type: "success",
                message: "退出成功!",
            });

            window.sessionStorage.removeItem("token");

            this.$router.replace("/login");
            })
            .catch(() => {});
        },
        //获取菜单
        async getMenuList() {
            const {data: res} = await this.$http.get('menus');

            if(res.meta.status !== 200) return this.$message.error(res.meta.msg)

            this.menuList = res.data
        },
        //点击按钮切换按钮折叠与展开
        toggleCollapse(){
            this.isCollapse=!this.isCollapse
        },
        //保存连接激活的状态
        saveNavState(activePath){
            window.sessionStorage.setItem('activePath',activePath)
            this.activePath=activePath
        }
  }
};
</script>

<style lang="less" scoped>
    .hwelcome {
    color: #fff;
    font-size: 15px;
    height: 25px;
    text-align: center;
    background: green;
    span {
        margin-left: 10px;
    }
    }
    .home-container {
    height: 100%;
    }
    .el-header {
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    background-color: #373d3f;
    align-items: center;
    color: #fff;
    font-size: 20px;
    > div {
        display: flex;
        align-items: center;
        img {
        width: 60px;
        height: 60px;
        border-radius: 50%;
        }
        span {
        margin-left: 15px;
        }
    }
    }
    .el-aside {
    background-color: #333744;
    .el-menu {
        border-right: none;
    }
    }
    .el-main {
    background-color: #eaedf1;
    }
    .iconfont {
    padding-right: 10px;
    }
    .toggle-button {
    background: #4a5064;
    font-size: 10px;
    text-align: center;
    line-height: 24px;
    color: #fff;
    letter-spacing: 0.2em;
    cursor: pointer;
    }
</style>